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Insight into the structural transformation of tetraphenylethylene acids at liquid–solid interface induced by linear aminofunctionalized triazine derivatives and annealing treatment

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Nano Research 2023年第12期16卷 13335-13342页

作者： Ting Meng xuan Peng Xunwen Xiao Ke Deng yu-Wu Zhong Qingdao Zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Beijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Science Nanchang Institute of TechnologyNanchang 330099China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of PhotochemistryInstitute of ChemistryChinese Academy of SciencesBeijing 100190China College of Materials and Chemical Engineering Ningbo University of TechnologyNingbo 315211China

The interaction between organic photoelectric molecules leads to the formation of a certain aggregation structure,which plays a pivotal role in the charge transport at the intermolecular *** view of this,we investigated the mechanism and law of intermolecular interaction by detecting the self-assembled behaviors between organic photoelectric molecules at the interface by scanning tunneling microscopy(STM).In this work,the structural transformations of tetraphenylethylene acids(H_(4)ETTCs)on graphite surface induced by temperature and triazine derivatives(zcy-19,zcy-27,and zcy-38 molecules)were studied by STM technology and density functional theory(DFT)*** room temperature,zcy-19 and H_(4)ETTC molecules formed a small range of ordered co-assembled nanostructure,while for zcy-27 or zcy-38 molecules,no co-assembled nanostructures were observed and only their own self-assembled structures existed on graphite surface,*** the thermal annealing trials,the original co-assembled H_(4)ETTC/zcy-19 structure disappeared,and only zcy-19 and H_(4)ETTC self-assembled in separate ***,new well-ordered H_(4)ETTC/zcy-27 or H_(4)ETTC/zcy-38 co-assembled structures appeared at different annealing temperatures,*** with DFT calculations,we further analyzed the mechanism of such structural transformations by triazine derivatives and *** reveal that triazine derivatives could interact with H_(4)ETTC by N–H···O and O–H···N hydrogen bondings,and whether temperature or zcy series compounds could achieve successful regulation of H_(4)ETTC assembly behavior is closely associated with the conjugated skeleton length of zcy series compounds.

关键词： tetraphenylethylene acids triazine derivatives annealing treatment scanning tunneling microscopy(STM)

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Method for detector description conversion from DD4hep to Filmbox

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Nuclear Science and Techniques 2024年第9期35卷 115-126页

作者： Zhao-Yang yuan Tian-Zi Song yu-Jie Zeng Kai-xuan Huang yu-Mei Zhang Zheng-yun You School of Physics Sun Yat-sen UniversityGuangzhou 510275China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

DD4hep serves as a generic detector description toolkit recommended for offline software development in next-generation high-energy physics(HEP)***,Filmbox(FBX)stands out as a widely used 3D modeling file format within the 3D software *** this paper,we introduce a novel method that can automatically convert complex HEP detector geometries from DD4hep description into 3D models in the FBX *** feasibility of this method was dem-onstrated by its application to the DD4hep description of the Compact Linear Collider detector and several sub-detectors of the super Tau-Charm facility and circular electron-positron collider *** automatic DD4hep–FBX detector conversion interface provides convenience for further development of applications,such as detector design,simulation,visualization,data monitoring,and outreach,in HEP experiments.

关键词： Detector description DD4hep FBX Geometry Offline software

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Spatial Interpolation and Sample Size Optimization for Soil Copper(Cu) Investigation in Cropland Soil at County Scale Using Cokriging

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Agricultural Sciences in China 2009年第11期8卷 1369-1377页

作者： pang Su,LI Ting-xuan,WANG Yong-dong,yu Hai-ying and LI Xi College of Resource and Environmental Science,Sichuan Agricultural University,Ya’an 625014,P.R.China [a]College of Resource and Environmental Science Sichuan Agricultural University Ya'an 625014 P.R. China

Knowledge on spatial distribution and sampling size optimization of soil copper （Cu） could lay solid foundations for environmetal quality survey of agricultural soils at county scale. In this investigation, cokriging method was used to conduct the interpolation of Cu concentraiton in cropland soil in Shuangliu County, Sichuan Province, China. Based on the original 623 physicochmically measured soil samples, 560, 498, and 432 sub-samples were randomly selected as target variable and soil organic matter （SOM） of the whole original samples as auxiliary variable. Interpolation results using Cokriging under different sampling numbers were evaluated for their applicability in estimating the spatial distribution of soil Cu at county sacle. The results showed that the root mean square error （RMSE） produced by Cokriging decreased from 0.9 to 7.77%, correlation coefficient between the predicted values and the measured increased from 1.76 to 9.76% in comparison with the ordinary Kriging under the corresponding sample sizes. The prediction accuracy using Cokriging was still higher than original 623 data using ordinary Kriging even as sample size reduced 10%, and their interpolation maps were highly in agreement. Therefore, Cokriging was proven to be a more accurate and economic method which could provide more information and benefit for the studies on spatial distribution of soil pollutants at county scale.

关键词： cropland soil county scale copper Cokriging sampling size

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Lower limit law of welding windows for explosive welding of dissimilar metals

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Journal of Iron and Steel Research International 2017年第8期24卷 852-857页

作者： Chang-gen Shi xuan Yang yu-heng Ge Jun You Hong-bao Hou PI.A University of Science and Technology Nanjing 210007JiangsuChina Baicheng Ordnance Test Center Baicheng 137001JilinChina

The influence of explosive charge thickness on the quality of explosive welding of dissimilar metals was *** lower limit law should be followed in the course of explosive *** welding experiments of stainless steel（410S）and steel（Q345R）were carried out in three different kinds of explosive charge thicknesses,namely 15,25and *** of morphology and mechanical properties of three samples were observed and *** was found that micro and small wavy bonding is mainly formed for charge thickness of 15mm whose strength is the highest with minor deformation and few defects in the interface;small and middle wavy bonding are mainly formed for charge thickness of 25 mm whose strength is comparatively mediocre;big wavy bonding is mainly formed for charge thickness of 35 mm whose strength is the *** cause of high bonding strength of the micro and small wavy interface was analyzed and verified on the basis of the results of Electron Probe Micro-Analyzer（EPMA）tests of three selected samples.

关键词： Explosive welding Welding window Lower limit law Cladding plate Bonding interface

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Changes of alloying elements on elasticity and solid solution strengthening ofα-Ti alloys:a comprehensive high-throughput first-principles calculations

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Rare Metals 2022年第8期41卷 2719-2731页

作者： Tao Liu Xiao-yu Chong Wei yu yun-xuan Zhou Hai-Guang Huang Rong-Feng Zhou Jing Feng Faculty of Material Science and Engineering Kunming University of Science and TechnologyKunming650093China yunnan Titanium Industry Co.Ltd Chuxiong675000China City College Kunming University of Science and TechnologyKunming650051China

Herein,the effects of 33 alloying elements on the elastic properties and solid solution strengthening(SSS)of a-Ti alloys were systematically studied via first-principles calculations based on a dilute solid *** alloying elements in these calculations were thermodynamically favorable,which indicated that these elements could be dissolved inα-Ti ***_(35)Os had the highest elastic modulus as compared to those of other dilute Tibased solid ***,Co,and Pt were found to be promising candidates for improving the ductilities ofα-Ti solid solution *** solution strengthening was analyzed using Cottrell's and Labush's *** on the solid solubility,Ir,Rh,Ni,and Pt were found to possess the best solid solution hardening effects in the following order:Ir>Rh>Ni>*** bonding state between Ti and the impurity atom was visually characterized owing to the difference between their charge *** integrating the calculations of mean bond length and mean population,the results showed that Ti-Os had the largest mean population and degree of delocalization of the electron cloud around the solute atom,implying ionic characteristics of Os and ***,after analyzing the alloying elements of each group,we found thatⅧ-group elements(Ru,Rh,Pd,Os,Ir,Pt)had good potentials for improving the comprehensive mechanical properties of Ti alloys.

关键词： Thermodynamics First-principles calculations Mechanical properties Titanium alloys Electronic structure

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Elastoplastic solutions for single piles under combined vertical and lateral loads

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Journal of Central South University 2011年第1期18卷 216-222页

作者： ZHANG Lei GONG Xiao-nan YANG Zhong-xuan yu Jian-lin Key Laboratory of Soft Soils and Geoenvironmental Engineering Ministry of Education Zhejiang University Hangzhou 310058 China Department of Civil Engineering Zhejiang University Hangzhou 310058 China

In order to improve the reliability of the design and calculation of single piles under the combined vertical and lateral loads, the solutions were presented based on the subgrade reaction method, in which the ultimate soil resistance was considered and the coefficient of subgrade reaction was assumed to be a constant. The corresponding computational program was developed using FORTRAN language. A comparison between the obtained solutions and the model test results was made to show the validity of the obtained solutions. The calculation results indicate that both the maximum lateral displacement and bending moment increase with the increase of the vertical and lateral loads and the pile length above ground, while decrease as the pile stiffness, the coefficient of subgrade reaction and the yielding displacement of soil increase. It is also shown that the pile head condition controls the pile responses and the vertical load may cause the instability problem to the pile. In general, the proposed method can be employed to calculate the pile responses independent of the magnitude of the pile deflection.

关键词： pile-soil interaction combined vertical and lateral loads ultimate resistance subgrade reaction method bendingmoment

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Research of Application of Passive Natural Ventilated Strategies of High-Density Urban Area

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Journal of Harbin Institute of Technology(New Series) 2014年第5期21卷 59-65页

作者： De-xuan Song Shao-yu Liu Si-Jie Liu College of Architecture and Urban Planning Tongji University College of Architecture Hongkong University

High-density development is becoming an inevitable tendency in Chinese urbanization. In this study,the application of natural ventilation in high-density urban development is discussed. Based on the domestic and foreign study on natural ventilation,indoor and outdoor natural ventilated strategies,and the application on natural ventilation in underground space development are analyzed. From the study,the relationship between passive and active ventilated technologies is interpreted into what is described to be synergistic,complementary and additive.

关键词： high-density natural ventilation passive strategies

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Superior performance in visible-light-driven hydrogen evolution reaction of three-dimensionally ordered macroporous SrTiO_(3) decorated with Zn_(x)Cd_(1−x)S

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Frontiers of Chemical Science and Engineering 2021年第6期15卷 1561-1571页

作者： Huiying Quan Kejiang Qian Ying xuan Lan-Lan Lou Kai yu Shuangxi Liu MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Technology for Complex Transmedia PollutionCollege of Environmental Science and EngineeringNankai UniversityTianjin300350China Institute of New Catalytic Materials Science and MOE Key Laboratory of Advanced Energy Materials Chemistry School of Materials Science and EngineeringNational Institute of Advanced MaterialsNankai UniversityTianjin300350China

It is of broad interest to develop emerging photocatalysts with excellent light-harvesting capacity and high charge carrier separation efficiency for visible light photocatalytic hydrogen evolution ***,achieving satisfying hydrogen evolution efficiency under noble metal-free conditions remains *** this study,we demonstrate the fabrication of three-dimensionally ordered macroporous SrTiO_(3)decorated with Zn_(x)Cd_(1−x)S nanoparticles for hydrogen production under visible light irradiation(λ>420 nm).Synergetic enhancement of photocatalytic activity is achieved by the slow photon effect and improved separation efficiency of photogenerated charge *** obtained composites could afford very high hydrogen production efficiencies up to 19.67 mmol·g^(−1)·h^(−1),with an apparent quantum efficiency of 35.9%at 420 nm,which is 4.2 and 23.9 times higher than those of pure Zn_(0.5)Cd_(0.5)S(4.67 mmol·g^(−1)·h^(−1))and CdS(0.82 mmol·g^(−1)·h^(−1)),*** particular,under Pt-free conditions,an attractive hydrogen production rate(3.23 mmol·g^(−1)·h^(−1))was achieved,providing a low-cost and high-efficiency strategy to produce hydrogen from water ***,the composites showed excellent stability,and no obvious loss in activity was observed after five cycling tests.

关键词： three-dimensionally ordered macroporous SrTiO_(3) Zn_(x)Cd_(1−x)S visible light hydrogen production promotion mechanism

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Experimental Investigation of Reflectometry as a Density Fluctuation Diagnostic

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Chinese Physics Letters 1996年第5期13卷 374-377页

作者： XU Hong-liang CAO Jin-xiang DING Wei-xing yu Chang-xuan Department of Modem Physics University of Science and Technology of ChinaHefei 230026

In this paper,a controlled laboratory experiment to investigate the response properties of reflec-tometry to the density fluctuations is *** reflectometer signal is observed to be highly spatially localized in the *** quantitative measurement has demonstrated that the signal originates about one free space wavelength of the probe•wave in front of the critical layer and this position is independent of the fluctuation *** is also found that the sensitivity of transverse response to wavenumbers is different from that of longitudinal response.

关键词： number. wave spatially

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An efficient and robust method to determine the optimal tap coefficients of high speed FIR equalizer

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Science China(Information Sciences) 2017年第2期60卷 177-187页

作者： Guanming HUANG Donesh GILLIN Dian ZHOU Jin LIU xuan ZENG Po-yu KUO Department of Electrical Engineering University of Texas at Dallas School of Microelectronics Fudan University Department of Electronic Engineering Yunlin University of Science and Technology

The FIR equalizer is a common way to compensate for the effect of ISI in high speed data transmission. One key issue for the FIR equalizer design is to find the optimal tap coefficient(TC) set. In this work,the TC search is formulated as an eye-diagram based global optimization problem and an efficient and robust multi-start point(MSP) optimizer is developed and applied to determine the optimal TC set. To guarantee a robust optimization procedure, an objective function based on the eye diagram is studied. It proves that a 330 x speedup is provided by the proposed method as compared with the Monte Carlo method. With the proposed method, the optimal design point of the equalizer can be further estimated.

关键词： tap coefficients global optimization multi-start point eye diagram Monte Carlo method

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